/*
 * Copyright (c) Huawei Technologies Co., Ltd. 2025. All rights reserved.
 * You can use this software according to the terms and conditions of the Mulan PSL v2.
 * You may obtain a copy of Mulan PSL v2 at:
 *          http://license.coscl.org.cn/MulanPSL2
 * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
 * EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
 * MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
 * See the Mulan PSL v2 for more details.
 */

#ifndef OMNISTREAM_EXECUTIONATTEMPTIDPOD_H
#define OMNISTREAM_EXECUTIONATTEMPTIDPOD_H

#include <string>
#include <nlohmann/json.hpp>
#include "../common/AbstractIDPOD.h" // Assuming this header defines AbstractIDPOD
#include "ExecutionGraphIDPOD.h"
#include "runtime/scheduler/strategy/ExecutionVertexIDPOD.h"
#include <stdexcept>

namespace omnistream {

    class ExecutionAttemptIDPOD {
    public:

        static constexpr int BYTE_BUF_LEN = ExecutionGraphIDPOD::SIZE + ExecutionVertexIDPOD::SIZE + sizeof(int32_t);

        // Default constructor
        ExecutionAttemptIDPOD() = default;

        ExecutionAttemptIDPOD(const ExecutionGraphIDPOD& executionGraphId, const ExecutionVertexIDPOD& executionVertexId, int attemptNumber)
            : executionGraphId(executionGraphId), executionVertexId(executionVertexId), attemptNumber(attemptNumber)
        {
            if (attemptNumber < 0) {
                throw std::invalid_argument("attemptNumber must be >= 0");
            }
        }

        ExecutionVertexIDPOD getExecutionVertexIDPOD()
        {
            return executionVertexId;
        }

        JobVertexID getJobVertexId() const
        {
            return executionVertexId.getJobVertexId();
        }

        int32_t getSubtaskIndex() const
        {
            return executionVertexId.getSubtaskIndex();
        }

        int32_t getAttempNumber()
        {
            return attemptNumber;
        }

        static int getByteBufLength()
        {
            return BYTE_BUF_LEN;
        }

        friend bool operator==(const ExecutionAttemptIDPOD& lhs, const ExecutionAttemptIDPOD& rhs)
        {
            return lhs.executionGraphId == rhs.executionGraphId
                && lhs.executionVertexId == rhs.executionVertexId
                && lhs.attemptNumber == rhs.attemptNumber;
        }

        friend bool operator!=(const ExecutionAttemptIDPOD& lhs, const ExecutionAttemptIDPOD& rhs)
        {
            return !(lhs == rhs);
        }

        friend std::size_t hash_value(const ExecutionAttemptIDPOD& obj)
        {
            std::size_t seed = 0x2A9B61C8;
            seed ^= (seed << 6) + (seed >> 2) + 0x21D57D88 + hash_value(obj.executionGraphId);
            seed ^= (seed << 6) + (seed >> 2) + 0x13579BDF + hash_value(obj.executionVertexId);
            seed ^= (seed << 6) + (seed >> 2) + 0x2468ACE0 + static_cast<std::size_t>(obj.attemptNumber);
            return seed;
        }
        // toString method
        std::string toString() const
        {
            return executionGraphId.toString() + "_" + executionVertexId.toString() + "_" + std::to_string(attemptNumber);
        }

        static ExecutionAttemptIDPOD randomId()
        {
            ExecutionGraphIDPOD graphId;
            ExecutionVertexIDPOD vertexId {JobVertexID(0, 0), 0};

            return ExecutionAttemptIDPOD(graphId, vertexId, 0);
        }

        NLOHMANN_DEFINE_TYPE_INTRUSIVE(ExecutionAttemptIDPOD, executionGraphId, executionVertexId, attemptNumber)
    private:
        ExecutionGraphIDPOD executionGraphId;
        ExecutionVertexIDPOD executionVertexId;
        int32_t attemptNumber;
    };

} // namespace omnistream
namespace std {
    template <>
    struct hash<omnistream::ExecutionAttemptIDPOD> {
        std::size_t operator()(const omnistream::ExecutionAttemptIDPOD& obj) const
        {
            return hash_value(obj);
        }
    };
}

#endif // OMNISTREAM_EXECUTIONATTEMPTIDPOD_H
